tests: Use drmFreeVersion() instead of drmFree()

drmFreeVersion() frees the memory allocated for the name, date and desc
fields in addition to that for the struct _drmVersion.

Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Thierry Reding <treding@nvidia.com>

tests/getversion.c

@@ -43,7 +43,7 @@ int main(int argc, char **argv)
 	assert(strlen(v->desc) != 0);
 	if (strcmp(v->name, "i915") == 0)
 		assert(v->version_major >= 1);
-	drmFree(v);
+	drmFreeVersion(v);
 	close(fd);
 	return 0;
 }